A few months ago, I disabled all of that stuff, so that YouTube only recommends videos based on my subscriptions and liked videos. I guess it's still personalization, but it's personalization that I have control over, which seems to have drastically improved both the privacy and the quality of recommendations.
I don't use Google for search, though, so I can't comment on that.
I don't use Google for search, though, so I can't comment on that.